Photographic apparatus



Nov. 14, 1939. J. E. BURKS 2.180.19

PHOTOGRAPHIC APPARATUS Filed July 25, 1957 5 Sheets-Sheet 1 INVENTORJay/v [T flak/ 5 A TORNEYS .5 E. BURKS PHOTOGRAPHIC APPARATUS Nov. 14,1939.

Filed July 25, 1957 5 Sheets-Sheet 2 m & T w a N5 W 5% ATTORNEYS Nov.14-, 1939. J. E. BURKS PHOTOGRAPHIC APPARATUS Filed July 25, 1957 5Sheets-Sheet 4 INVENTOR Jam/f. (fa/ms fir 7 4 AT ORNEYS Nov. 14, 1939.J. E. BURKS PHOTOGRAPHIC APPARATUS Filed July 23, 1937 5 Sheets-Sheet 5nnnllllllllilmllllilillliiillllll INVENTOR do/m/fflz/ers QRNEYS PatentedNov. 14, 1939 PATENT OFFECE 2,180,194 rno'rocmrnrc APPARATUS John E.Burks, Great Neck, N. Y., assignor Max Fleischer, New York, N. Y.

Application July 23, 1937, Serial No. 155,170

11 Claims.

This invention relates to photographic apparatus and has for itsprincipal object to provide a novel form of projection printer wherebythe pictures contained in the several frames of a motion picturenegative film of the usual type may be successively printed byprojection upon a flat rectangular sensitized surface such, for example,as a single sheet of sensitized paper with the pictures disposed inoblique columns and in such way that when said sheet is bent into theform of a cylinder with the upper and lower edges of the sheet abuttingeach other, the sequence of pictures will be in the form of a continuousspiral such as is described in and forms part of the subject matter of apending application filed by Max Fleischer and myself on April 5, 1937,Serial No. 134,988.

Another object of my invention is to provide such an apparatus in whichthe movable bed or platen carrying the sheet upon which the pictures aresuccessively printed may be accurately and without jar moved into itssuccessive positions in step with the intermittent movement of themotion picture negative film.

Still another object of my invention is to provide such an apparatushaving means to compensate for the various degrees of shrinkage'inherentin the different papers used for photographic prints so that thedimensions of the finished sheet of pictures will exactly fit the sizedrum upon which they are designed to be mounted and not leave any gapbetween the top row and bottom row of pictures in each of the severalcolumns.

Other objects and advantages will appear from the following descriptionof the invention taken inconnection with the attached drawings in which:

Fig. l is a front elevation of the apparatus.

Fig. 2 is a cross-section on the line 2--2 of Fig. l.

3 is a diagrammatic view in perspective of the optical arrangement ofthe projector portion of the apparatus.

Fig, 4 is a plan view of the movable bed portion of the apparatus withpart of the platen cut away.

Fig. 5 is a view of the underside of the platen.

Fig. 6 is a view on the line 6-6 of Fig. 4.

Fig. '7 is a view on the line 1-4 of Fig. 6.

Fig. 8 is a detailed plan view of a portion of the mechanism for movingthe platen.

Fig. 9 is a view on the line 9-9 of Fig. 8.

Fig. 10 is a view on the line 3-40 of'Fig, 9.

Fig. 11 is a view on the line llll of Fig. 10.

Fig. 12 is a View on the line l2l2 of Fig. 11. Fig. 13 is a view on theline l3'l3 ofFig. 8.

Fig. 14 is a detailed view of part of the operating mechanism of theprojector portion of the apparatus. f

Fig. 15 is a view on the line I5|5 of Fig. 14. Fig. 16' is a view of thestar wheel whereby m0- tive power is intermittently communicated to theapparatus.

Referring to the drawings,| is a stand of open i skeleton constructionmade preferably of angleiron which serves to support the severalcomponent parts of the apparatus hereinafter described. 2 is ahorizontal carriage of an open truss construction preferably made of astrong light metal such as an aluminum alloy, slidably supported uponthe stand I. Also suppcrted on said stand I directly above and normal tothe upper surface of the carriage 2 is the projector portion of theapparatus consisting of alight proof lamphouse 3 containing anincandescent lamp i positioned beneath the spherical reflector 5, asheet of ground glass 6 beneath which is'adjustably mounted a condensorl, a light tube 8 terminating at the bottom in a suitable housing 9which contains a pivoted opaque safety shutter It, a revolving exposureshutter l l, and a manually operated pivoted safety filter shutter 92, aconnecting light tube l3 extending therefrom to a housing l4 throughwhich the film l5 from which the print is to be made is intermittentlyadvanced from the feed reel 16 to the take-up reel ll beneath anothercondensor i8 and between two glass plates l9 and 20 with an apertureplate 2| thereunder conforming to the frame of the film, and aprojection lens 22 in the lens mount 23 equipped with aniris diaphragm.25 is an electricmotor connected by a belt to a pulley 26 mounted on oneend of the shaft 2'! to the other end of which shaft is attached theworm 28 which drives the gear 29 and star wheel 30, both of which areattached to the opposite ends of the shaft 3|. 32 is a shaft disposed inco-axial align ment with the shaft 3| and carrying on its end adjacentthe star wheel 39 a wheel 33 formed with a hub 34 which supports thepivoted rocker arm 35, one end of which is adapted to engage in thenotches of the star wheel 39 while the other end is positioned in a slot36 in the periphery of the wheel 33 into which it may be forced asufficient distance against the pressure of the coil spring 31 to liftthe other end out of engagement with'the star wheel 30. Saidslot (itnear its outer end is in the form of an arcuate depression 38 in theperiphery of the wheel 33 and is adapted to receive the roller 39 whichis rotatably mounted on the vertical arm 40 of a bell crank and is heldin close engagement with the periphery of the wheel 33 by means of thetension coil spring 4i 5 attached to the rigid arm 42 mounted on thebase 43, upon which are also mounted the bearings 44 and 45 for theshafts 32 and 3! respectively. Pivotally mounted on the underside of thebase 43 is the lever 36, one end of which is adapted to 10 be lifted bya pivoted lever 4'! while the otherend is pivotally connected to a rod48 extending upwardly through an opening in the base 63 and provided atits upper end with a stop pin 49 adapted to engage with the horizontalarm 56 of 15 the above said bell crank. 5! is a vertical bar ofrectangular cross section slidably' mounted in conforming openings inthe horizontal portions 52 and 53 of the vertical standard 54 attached 1to the said base t3. Said bar near its upper end 20 is provided with apin 55 extending therethrough and adapted to limit the upward movementof said bar. Said bar. at its upper end is operatively connected to thehorizontal arm of the bell crank 56 the vertical arm of which is con- 25nected by means of the tension spring 5'." and the link 58 to thepivoted opaque safety shutter ii] which is normally held in its closedposition under the tension of the coil spring 58 and is opened by thedownward movement of the bar 5|, the

30 intervening coil spring 5? permitting further downward movement ofthe bar 5! after the shutter It has reached its open position. Pivotallymounted on one side of the bar 5! and at a level suitable forcooperation with the horizontal pin 35 '59 which is attached by the setscrew iii to the vertical bell crank arm dB is a pawl 62 which. is heldin an outwardly extending position by the flat spring l'i il. Upon theside of said bar 51 opposite to that upon which is located the pawl 4062 is a bracket 63 provided with an opening to receive the vertical rod64 which is slidably mounted in openings in the upper and lowerhorizontal portions 52 and 53 of the standard 5d and extends through anopening in the base 43 45 where its lower end is operatively connectedto the lever 55 whereby said rod 64 may be pulled downward against thetension of the cailspring 66 which is attached to the said upperhorizontal portion 52 of the standardfi l and to the rod 64 5 by thescrew fastened collar 6'5. A collar 68 rigidly attached to said rod 6 1is adapted by engagement with the bracket 63 to depress said bar whilethe collar 69 also rigidly attached to said rod is adapted to engage anddepress the hori- 55 zontal bell crank arm 59. l!) is another bell crankpivotally mounted on the base 43 and has journaled in its upper arm aroller ll similar to the roller 39 which may be pressed into engagementwith the periphery of the wheel 33 on the 60 side opposite to that ofthe roller 39 by increasing the tension of the coil spring '12 attachedto said bell crank iii by moving the crank handle 13 to the positionshown in dotted lines (Fig. 14).

Upon the other end of the shaft 32 is fixed a 5 gear "i i meshing withthe gear 15 attached to one end of the shaft it which terminates withinthe housing i i and is there operatively connected to the feed sprocketsiii? and I68, the take-up reel H and to a pull claw mechanism of theusual 7 type adapted by engagement with the sprocket holes of the motionpicture film to intermittently advance said film frame by frame past theaperture 2i. Also mounted on said shaft 32 adjacent the gear id is thebevel gear H in mesh. with a 75 bevel gear 78 mounted on the lower endof the vertical shaft 79. The rotation of said shaft l9 through thechain of bevel gears 80, 8!, 82 and 83 operates the rotating shutter llwhile an eccentric cam 84 attached to said shaft it serves to open andclose an electrical circuit across the 5 ends of the spring contacts 85and 86. The upper end of the said shaft F9 is provided with a pair ofbevel gears 8'! and 86 to operate the counter 89. whereby a record maybe kept of the number of frames of film successively printed by theapparatus.

The operation of the projector portion of the apparatus is as follows:With the electric motor 25 in operation, the lever 65 is for an instantdepressed by hand pulling down the rod 54 whereby the collar 68 isbrought into engagement with the bracket 53 causing the bar M to descendcarrying the pawl 62 beneath the pin til and actuating the bell crank 56which through the link 58 opens the opaque safety shutter Hi. With thefurther downward movement of the rod 6% the collar 69 engages with anddepresses the bell crank horizontal arm 5h causing the roller 32 to bewithdrawn from the arcuate depression 38 in the periphery in the wheel33 and allowing the rocker arm 35 to move outward under the pressure ofthe spring 3'1, thus causing the other end of said rocker arm to engageone of the notches of the rotating star wheel 35 whereby the wheel 33 iscaused to rotate with the star wheel 3%. At the same time the pin Bi]has been pushed into engagement with the upper end of the pawl $2thereby preventing any upward movement of the bar 5! and thus holdingthe opaque safety shutter ill in its open position. The wheel 33 willcontinue to rotate to the extent of one complete revolution when thespring tensioned roller 39 again engages with the arouate depression 38in the periphery of the wheel 33 depressing the rocker arm 35 into theslot 36 and thereby disengaging it from the star wheel 33 wherebyfurther rotation of the wheel 33 is stopped. At the same time the pin6!! is with drawn from engagement with the pawl permitting the bar 5| tospring upward under the tension of the coil spring 59 attached to thebell crank 56 and the opaque safety shutter it to close.

It is to be noted that the height of the collar 59 above the horizontalbell crank arm 59 is slightly greater than that of the collar 68 abovethe bracket 64 so that the opaque safety shutter ii is opened in advanceof the disengagement of the roller 39 from the arcuate depression 338 inthe periphery of the wheel 33. Furthermore the ratio of theaforementioned cooperating gears and the design of the cam 84 and itsposition and the position of the shutter H on the shaft iii are suchthat in the first one-half revolution of the wheel 33 starting from aposition where the roller 39 is in engagement with the arcuatedepression 33, the shutter H which is formed with a cut out sector ofapproximately 120 has been brought from a closed position to a wide openposition in the light path, and during substantially the entire secondone-half revolution of said wheel 33 the said shutter H is in a closedposition, and as soon as said shutter has moved from an open to a closedposition in the course of its rotation the cam 8 engages the springcontact 355 and closes momentarily an electric circuit across the endsof the spring contacts 35 and 86 while the pull claw mechanism connectedto the shaft 16 operates to bring the next frame of the motion picturenegative film I into register with the aperture in the plate BI.

The closing of said electrical circuit by the cam 84 operates thatportion of the apparatus whereby the sheet of sensitive paper to receivethe images projected from the film i5 is caused to be movedintermittently both longitudinally and laterally, in step with themovement of said film. Said portion of the apparatus is described withreference to the drawings as follows:

The supporting stand I adjacent its ends is provided with horizontalguide rails 90 and SH disposed in a line at right angles to thediroction of travel of the film I5 upon which rails is I slidablysupported the carriage 2 by means of the guide blocks 92, 93, 94 and 95rigidly at tached to said carriage and each formed with a depressionconforming to the cross section of said rails. Also mounted on saidstand and disposed parallel to the rails 90 and SI are two toothed racks96 and 91. 98 and 09 are two pinions mounted on opposite ends of theshaft I00 journaled on said carriage and meshing with the racks 96 and01 so that by rotation of the shaft I00 the said carriage is moved alongsaid rails 90 and 9|. Mounted on the top side of said carriage anddisposed parallel to each other and at an oblique angle to the line oftravel of the film I5 are two horizontal guide rails I0! and I82 uponwhich is slidably mounted a platen I03, to support a sheet of sensitizedpaper held fiat thereon by the glass plate I04. I05, I06, I01 and I03are guide blocks attached to the underside of the platen and are formedwith depressions conforming to the cross-section of the rails Is! andI02. Movement of the platen 503 along the rails NH and I02 in thegeneral direction of the travel of the film I5 but somewhat obliquethereto is accomplished by the tension of the flat coil spring I09mounted on the carriage 2, one end of which spring is attached to theunderside of the platen I03 as at H0. while movement in the oppositedirection is accomplished manually thereby putting the spring H30 intension. The intermittent movement of the platen I03 is controlled by apair of pawls Ill and H2 coacting with successive of the cleats H3attached to the underside of the platen, disposed substantiallytransversely of the direction of longitudinal movement of the platen I03and equally spaced from each other along any line in said direction.

H4 is a base plate slidably mounted on the transverse guide rails I I5and I IS on the carriage 2 and movable transversely of said carriage bymeans of the threaded shaft II'I in conjunction with the internallythreaded blocks H8 and H0 fixed on the underside of the plate II I. Saidthreaded shaft H1 is manually rotated by the crank handle I20. Journaledas at I2I on the plate H4 is the shaft I22 carrying on its inner end thewheel I23 which is provided on one side with the eccentric pin I24. I25is a horizontal sliding member mounted in the upright guides I26 and I2?attached to the base plate H4 and operatively connected to the pin I24by means of the connecting rod I28 which is adjustable as to lengthsince it is constructed in the form of a turnbuckle. Thus as the wheelI23 revolves a reciprocating movement is imparted to the sliding memberI25. The pawl H2 is pivotally attached at one end as at I29 to theupperside of the sliding member I25 and its other end is normally heldin engagement with one of the cleats II3 on the underside of the platenI03 by the compression spring I30 mounted on the sliding member I25.Pivoted at one end to a downwardly extending bracket I3I attached to thesliding member I25 is a lever I32 the other end of which is adapted toengage with and be depressed by the pin I24 during the lower half ofeach revolution of the wheel I23. Said lever I32 is connected to thepawl I I2 by the link I33.

The pawl III which is in the form of a lever is pivotally mountedsubstantially midway of its length on the upright bracket I34 attachedto the base plate I I4. One end of said pawl is normally held inengagement with one of the cleats II3 on the underside of the platen I03by the compression spring I35 while the other end is adapted to engagewith and be lifted by the pin I24 during the upper half of eachrevolution of the wheel I23.

Mounted on the outer end of the shaft I22 is the wheel I36 similar indesign tothe wheel 33 having a hub I3! in which is pivoted a rocker armI38 one end of which is adapted to be pressed into a slot in theperiphery of the said wheel I36 against the compression of the coilspring I39 by the roller I40 journaled in the upright arm I4I pivotallymounted as at I42 on a lateral extension I43 of the base plate II4. Saidroller I40 is normally held seated in an arcuate depression in theperiphery of said wheel I33 at the orifice of said slot by the tensionspring I44, whereby the other end of said rocker arm I38 is held out ofengagement with the star wheel I45. Said star wheel I45 is mounted onone end of the shaft I48 and is disposed adjacent and in axial alignmentwith the wheel I36. On the other end of said shaft is mounted a gear I4!in mesh with and driven by the worm I48 on the shaft of the electricmotor I49. I50 is a solenoid supported by the bracket I5! on thebaseplate extension I43 which also supports the bearing III for theshaft I46 and the electric motor I49. The armature of said solenoid I50is at tached by a link I 52 to the upper end of the upright arm I4I, sothat when said solenoid is energized by the rotating cam 84 closing thesolenoid circuit across the switch points 85 and 86, the roller I40 iswithdrawn from engagement with the arcuate depression in the peripheryof the wheel I36 thus permitting the adjacent end of the rocker arm I33to emerge from the slot and the other end of said rocker arm to engagewith the star wheel I45 whereby the power from the electric motor, whichis normally in continual operation, is transmitted to the wheel I23.

As shown in Figs. 8 and 9, the above described mechanism for thetransverse movement of the platen I03 is shown in the position reachedshortly after the shutter II has closed and where the cam 84 in thefurther rotation has already closed for an instant the solenoid circuitreleasing the rocker arm I38, with the result that the wheel I23 hasbegun to rotate and will continue to rotate for the space of onerevolution until the roller I40 again engages the said arcuatedepression and forces the adjacent end of the rocker arm I38 into theslot. Starting from the position of the pin somewhat below the deadcenter position as shown in Figs. 8 and 9 and with the wheel I23rotating in a counter clockwise direction it will be noted that as thepin moves up to the horizontal level of the shaft E22 the sliding memberI25 carrying with it the platen I03 will be pushed by the pawl I I2 aslight extent, say a thirty-second of an inch, just suificient tomovement of the platen I 03.

cause the cleat I I3 pressing against the pawl l H to be separatedtherefrom, while further rotation of said wheel will cause the pin 124to bear upwards against the adjacent portion of the pawl lli therebydepressing the other end and permitting it to pass under the said cleatwhile the platen moves backwards, under the tension of the coil springN38, with the receding sliding member 525. During the second quarterrevolution of the wheel E23, the downward movement of said pin I24 willpermit the pawl III to rise so that at the end of backward travel of thesliding member 525 the pawl ill will engage the next succeeding cleat H3preventing further During the third quarter revolution of said wheel thelever arm 45-32 will be depressed by the pin I24 thus depressing thepawl HE and permitting it to pass on the underside of the cleat l l3with which it was in engagement and move upward and forward against thenext succeeding cleat already in engagement with the pawl Ill, so thatwhen the wheel E23 comes to a stop with the pin 52% somewhat below thedead center position shown and 9, the platen m3 will be held at rest bythe pawl III with the pawl H2 just a trifle short of being in contactwith the said cleat during the period of further rotation of the shaft'59 when the shutter It in the course of its rotation allows the lightto project the image of a frame of the negative film l5 upon the portionof the sensitized sheet Hlict occupying the field of the lens. With eachrevolution, therefore, of the wheel I23 the platen will be moved apredetermined distance equal to the spacing of the cleats H3 along theline of engagement with said pawls. Such spacing is governed by theheight of the printed pictures so that the successive pictures projectedfrom successive frames of the negative motion picture film l5 will forman oblique column, each picture in the column being offset from thepreceding picture a distance depending upon the degree oi obliquity ofthe rails HM and N32 with respect to the line of travel of the film 15.This degree of obliquity is equal to the width of the column, asmeasured along the top of a picture,for the vertical length of thecolumn.

When one column of pictures has been printed the platen is movedmanually back along the rails 9535 and 582 to its starting positionthereby again putting the spring I09 under tension. The inclination ofthe pawls ill and M2 readily permits such movement. At the same time theplaten. M33 together with its supporting carriage 2 moved laterally adistance equal to the width of the column so that the succeedingpictures will be printed in a similar way in a parallel column. Suchlateral movement is accomplished by means of the rack 653 attached tothe unders de of the platen Hi3 which rotates the gear and the disc I55which carries on its face ad acent its periphery the pawl I56 adapted toengage with and rotate in one direction the internal ratchet wheel i5!and the bevel gear E58 which is slidably mounted on the same shaft withthe ratchet wheel l5! and by means of the arm may be placed in or out ofmesh with the bevel gear 55s attached to the shaft Hit. It will thus beseen that with the intermittent movement of the platen H33 in thegeneral direction of the travel of the film [5 no lateral movement ofthe carriage 2 takes place since the pawl i558 merely rides over theteeth of the internal ratchet wheel i5? and imparts no motion thereto.The

size and ratio of the several gears comprising the column spacingmechanism is such that the same desired extent of lateral movement ofthe carriage 2 takes place each time the platen is returned to itsstarting position. Such lateral movement of the carriage 2 may beaccomplished manually, if preferred at any time, by unmeshing the gearsM8 and H9 and driving the gear 859 by the bevel gear Mill on the shaftl6! by means of the hand crank H52.

To allow for the various degrees of shrinkage resulting from developmentand other processing of the various photographic papers that may be usedfor the sensitized sheet Villa so that a finished picture sheet of anexact definite size may be assured, means are provided in the printingoperation for allowing for such different degrees of prospectiveshrinkage.

which controls the height of each printed picture in the columns, arenot arranged in parallel but are spaced further apart at one end than atthe other. This variation in their spacing need only be sufiicient toaccommodate papers ranging from those having the greatest amount ofshrinkage to those having the least amount of shrinkage, and since thebase plate l H! carrying the escapement pawls ill and H2 is adjustablelaterally of the platen Hi3 and the point of engagement of the p-awlsill and H2 with the cleats H3 may be located at any place along thelength of said cleats by means of the threaded shaft M1, thelongitudinal space on the sensitized paper I04 used for the printing ofeach of the successive projected images from the film l5 may be variedto any extent between these two extremes. This variation in the extentof the spacing between the cleats H3 along their length will requirethat the radius of eccentricity of the crank pin E24 be adjusted inaccordance with the said spacing at the particular location of the pawlsIll and l i2 so that said radius will be at all times a trifle more thanone-half the distance on centers between said cleats at such location.This slight excess is for the purpose of enabling the pawl 6 52 to pushthe cleat out of contact with pawl ill at the beginning of the cycle ofrotation of the wheel E23 and permit the next succeeding cleat to comeinto contact with the pawl i It at the end of backward travel of thesliding member I25. To provide means for such adjustment the pin I24 ismounted on a separate plate I63 slidably mounted in a groove H54. in theside of the wheel i253 and adjustable radially of said wheel by means ofthe feed screw Hi5 periphery of said wheel and fitting in a threadedbore in the end of the plate 633. When the radius of the pin I26 is thuslengthened or shortened it will generally be necessary to shorten orlengthen the connecting rod I28 so that the cleat H3 will bear againstthe pawl iii and be just out of engagement with the pawl H2 when theplaten its is at rest. This is readily accomplished since the saidconnecting rod 28 is constructed in the form of a turnbuckle.

The sensitized paper will shrink at the same ratio in all directions andthe above described means for making due allowance for such shrinkage byaltering the longitudinal space for each picture and thus the linealdimension of each column of pictures, will at the same time provide forlateral or cross column shrinkage of the paper. Since the degree ofobliquity of the rails l0! and i832 is constant a greater or less extentof travel of the platen M3 in returning it at the It will be noted thatthe equally spaced cleats H3, the spacing of rotatably fixed in the endof each column of printed pictures to the starting position will cause aproportionately greater or less length of the rack I53 to act upon thegear I54 and thereby move the platen a correspondingly greater orlessdistance transversely of the lines of travel of the film I5 thusallowing for the greater or less width of the pictures in said columns.

If in the operation of the apparatus it is desired to advance the filmI5 one frame without making an exposure the lever 46 is lifted by meansof the pivoted lever 41 thereby causing the pin 49 to depress thehorizontal bell crank arm 50 whereby the roller 39 is withdrawn fromengagement with the arcuate depression in the periphery of the wheel 33and allows the said wheel to rotate for the extent of one revolution butSince the vertical bar 5| is not moved downward by this operation theopaque safety shutter I remains closed and no light passes through theoptical system to the sensitized paper I04a on the platen I03, and if itis desired at the same time that the platen I03 should remain stationarythe switch I66 in the solenoid circuit is opened thus permitting noactuation of the platen moving mechanism.

Where it is desired to stop the apparatus at a point where with theshutter II in an open position the image on one frame of the film I5 isprojected on a sheet of paper on the platen I03 for the purpose, forinstance, of focusing or framing the projected image, the crank I3 isturned to the position shown in the dotted lines in Fig. 14 therebybringing the roller II into engagement with the periphery of the wheel33 so that in the course of substantially a one-half revolution of thewheel 33 the arcuate depression 38 comes opposite the roller II, therocker arm 35 will be pressed into the slot 36 thus disengaging it fromthestar wheel 30 and stopping the shutter II in its open position. Inthis case the manually operated safety filter shutter I2 is closed toprevent exposure of the sensitized paper It is to be understood that myinvention is in no wise restricted to the embodiments illustrated orreferred to but that modifications may be made without departing fromthe spirit or sacrificing any of the advantages of the invention asdefined in the appended claims.

What I claim is:

1. A projection printer of the class described which includes aprojector adapted for the intermittent projection of successive framesof a motion picture film upon a sheet of sensitized material, a flatsupport for said sheet movable in the focal plane of the lens of saidprojector, means controlled by the operation of the projector forintermittently moving said support a predetermined distance in onedirection in a straight line oblique to the line of travel of the filmin the projector and in step with the intermittent advancement of saidfilm, and means actuated by the movement of said support in the oppositedirection to move said support a predetermined distance transversely ofthe line of travel of said film.

2. A projection printer of the class described which includes aprojector adapted for the intermittent projection of successive framesof a motion picture film upon a sheet of sensitized material, a flatsupport for said sheet movable in the focal plane of the lens of saidprojector and means controlled by the operation of the projector forintermittently moving said support a predetermined distance in astraight line oblique to the line of travel of the film in the projectorand in step with the intermittent advancement of said film, said meansincluding tension means connected to said support, a series of cleatsattached to said support and disposed substantially transversely of theline of travel of the film, a sliding pawl adapted to engage each ofsaid cleats in succession and to move therewith and a stationary pawladapted to engage each of said cleats in succession and hold saidsupport at rest.

3. A projection printer of the class described which includes aprojector adapted for the intermittent projection of successive framesof a motion picture film upon a sheet of sensitized material, a fiatsupport for said, sheet movable in the focal plane of the lens of saidprojector and means controlled by the operation of the projector forintermittently moving said support a predetermined distance in adirection oblique to the line of travel of the film in the projector andin step with the intermittent advancement of said film, said meansincluding tension means connected to said support, a series of cleatsattached to said support and disposed substantially transversely of theline of travel of the film and slightly oblique to each other, a slidingpawl adapted to engage each of said cleats in succession and to movetherewith and a stationery pawl adjacent said sliding pawl and adaptedto engage each of i said cleats in succession and hold said support atrest, said pawls being adjustable longitudinally of said cleats.

' 4. A projection printer of the class described which includes aprojector adapted for the intermittent projection of successive framesof a motion picture film upon a sheet of sensitized material, afiatsupport for said sheet movable in the focal plane of the lens of saidprojector, means controlled by the operation of the projector forintermittently moving said support a predetermined distance in onedirection oblique to the line of travel of the film in the projector andin step with the intermittent advancement of said film,

said means including tension means connected to said support, a seriesof cleats attached to said support and disposed substantiallytransversely of the line of travel of the film and slightly oblique toeach other, a sliding pawl adapted to engage each of said cleats insuccession and to move therewith and a stationery pawl adjacent saidsliding pawl and adapted to engage each of said cleats in succession andhold said support at rest, said pawls being adjustable longitudinally ofsaid cleats-and means actuated by the movement of said support in theopposite direction to move said support and said pawls transversely ofthe line of travel of said film.

5. A projection printer of the class described which includes aprojector adapted for the intermittent projection of successive framesof a motion picture film upon a sheet of sensitized material, a flatsupport for said sheet movable in the focal plane of the lens of saidprojector, means controlled by the operation of the projector forintermittently moving said support a predetermined distance in adirection oblique to the line of travel of the film in the projector andin step with the intermittent advancement of said film, said means beingadjustable to vary the distance which said support is so intermittentlymoved, and means actuated by the movement of said support in theopposite direction to move said support transversely of the line oftravel of said film.

6. A projection printer of the class described which includes aprojector adapted for the intermittent projection of successive framesof a motion picture film upon a sheet of sensitized ma-, terial, a fiatsupport for said sheet movable in the focal plane of the lens of saidprojector and means controlled by the operation of the projec-v tor forintermittently moving said support a predetermined distance in adirection oblique to the line of travel of the film in the projector andin step with the intermittent advancement of said film, said meansincluding tension means connected to said support, a series of cleatsattached to said support and disposed substantially transversely oi theline of travel of the film With the spaces between said cleats varyingequally along the length of said cleats, a sliding pawl adapted toengage each of said cleats in succession and to move therewith and astationary pawl adapted to engage each of said cleats in succession andhold said support at rest, said pawls being movable transversely of theline of travel of the film- 7. A projection printer of the classdescribed which includes a projector adapted for the intermittentprojection of successive frames of a motion picture film upon a sheet ofsensitized material, a fiat support for said sheet movable in the focalplane of the lens of said projector and means controlled by theoperation of the projector for intermittently moving said support apredetermined distance in a direction oblique to the line of travel ofthe film in the projector and in step with the intermittent advancementof said film, said means including a series of cleats attached to saidsupport and disposed substantially transversely of the line of travel ofthe film with the spaces between said cleats varying equally along thelength of said cleats.

8. A projection printer of the class described which includes aprojector adapted for the intermittent projection of successive framesof a motion picture film upon a sheet of sensitized material, a flatsupport for said sheet movable in the focal plane of the lens of saidprojector, means controlled by the operation of the projector forintermittently moving said support a predetermined distance in adirection oblique to the line of travel of the film in the projector andin step with the intermittent advancement of said film, said meansincluding. a series of cleats attached to said support and disposedsubstantially transversely of the line of travel of the film with thespaces between said cleats varying equally along the length of saidcleats, and means actuated by the movement of said sup- Por in he p s tdirection o m v sa d upport transversely of the line of travel of saidfilm.

9. A projection printer of the class described which includes aprojector adapted for the intermittent projection of successive framesof a motion picture film upon a sheet of sensitized material, a fiatsupport for said sheet movable in the focal plane of the lens of saidprojector and means controlled b the operation of the projector forintermittently moving said support a predetermined distance in adirection oblique to the line of travel of the film in the projector andin step with the intermittent advancement of said film, said meansincluding a series of cleats attached to said support and disposedsubstantially transversely of the line of travel of the film with thespaces between said cleats varying equally along the length of saidcleats and a coacting pawl adjustably positioned to engage said cleatsat different points along their respective lengths.

'10. In a projection printer of the class described, a projector adaptedfor the intermittent projection of successive frames of a motion picturefilm upon a sheet of sensitized material, a flat support for said sheetpositioned in the focal plane of the lens of said projector and slidablymounted on rails disposed obliquely to the line of travel of the film,means for intermittently moving said support a predetermined distance inone direction in step with the intermittent advancement of said film andmeans actuated by the movement of said support in the opposite directionto shift said support a predetermined distance laterally of the line oftravel of said film.

11. In a projection printer of the class described, a projector adaptedfor the intermittent projection of successive frames of a motion picturefilm upon a sheet of sensitized material, a fiat support for said sheetpositioned in the focal planev of the lens of said projector andslidably mounted on rails disposed obliquely to the line of; travel ofthe. film, means for intermittently moving said support a predetermineddistance inone direction in step with the intermittent advancement ofsaid film and means actuated by the movement of said support in theopposite direction to shift said support a predetermined distancelaterally of the line of travel of said film, said shifting meansincluding a pawl operated ratchet operatively connected to,- a pinionengaging a stationary rack.

' JOHN E. BURKS.

